An enhanced three-axis tilt sensor fulcrum control circuit

Abstract

The utility model provides an enhanced three-axis tilt sensor fulcrum control circuit, which adopts a three-axis tilt sensor with small temperature drift, high precision and better anti-seismic performance, and has better versatility and reliability. It includes an MCU main control module, an RF wireless transmission module, and a temperature sampling module. The MCU main control module is connected to the RF wireless transmission module and the temperature sampling module respectively. It also includes a sensor module connected to the main control module. The main control module includes an At128 single-chip microcomputer IC8, and the At128 single-chip microcomputer IC8 is respectively connected to a clock IC9, a crystal oscillator X2 and a storage chip IC6; the sensor module includes a sensor chip IC7, and the sensor chip IC7 adopts an ADXL35X three-axis acceleration sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensor network acquisition fulcrums, in particular to an enhanced three-axis tilt sensor fulcrum control circuit. Background Art

[0002] The principle of the three-axis tilt sensor is mainly based on its three internal accelerometers and three gyroscopes to measure the inclination angle of the object on the X, Y, and Z axes. The Chinese utility model patent application number 2021228869244 discloses an improved three-axis tilt sensor fulcrum control circuit, which uses the SCA3300 accelerometer. However, the use of this sensor has a large temperature drift and cannot adapt to monitoring scenarios with large temperature changes; at the same time, its seismic performance is poor. In the case of multiple vibrations (such as railway environment applications), the chip will frequently have abnormalities that exceed the actual collection range during collection, which can easily cause permanent damage to the chip. Utility Model Content

[0003] In view of the problems that the sensors used in the existing three-axis inclination sensor fulcrum control circuit have large temperature drift and poor seismic resistance, the utility model provides an enhanced three-axis inclination sensor fulcrum control circuit, which uses a three-axis inclination sensor with small temperature drift, high precision and better seismic resistance, and has better versatility and reliability.

[0004] The technical scheme is as follows: an enhanced three-axis tilt sensor fulcrum control circuit, which includes an MCU main control module, an RF wireless transmission module, and a temperature sampling module, wherein the MCU main control module is connected to the RF wireless transmission module and the temperature sampling module respectively, and is characterized in that: it also includes a sensor module connected to the main control module, wherein the main control module includes an At128 single-chip microcomputer IC8, and the At128 single-chip microcomputer IC8 is respectively connected to a clock IC9, a crystal oscillator X2, and a storage chip IC6;

[0005] The sensor module includes a sensor chip IC7, and the sensor chip IC7 adopts an ADXL35X three-axis acceleration sensor. Pins 1 and 3 of the sensor chip IC7 are respectively connected to pins 42 and 43 of the At128 single-chip computer IC8, and pins 2 and 4 of the sensor IC7 are connected and then grounded. Pin 5 of the sensor chip IC7 is connected to one end of capacitor C25, one end of capacitor C29 and a 3.3V2 voltage source, and pin 6 of the sensor chip IC7 is connected to the other end of the capacitor C25, the other end of the capacitor C29, one end of the capacitor C26, one end of the capacitor C28 and grounded, and the other end of the capacitor C26 is connected to the other end of the capacitor C28 After being connected, the 8th pin of the sensor chip IC7 is connected, the 9th pin of the sensor chip IC7 is connected to one end of the capacitor C23, one end of the capacitor C24, one end of the capacitor C49, one end of the capacitor C50 and grounded, the other end of the capacitor C23 is connected to the other end of the capacitor C24 and then connected to the 10th pin of the sensor chip IC7, the other end of the capacitor C49 is connected to the other end of the capacitor C50 and then connected to the 11th pin of the sensor chip IC7 and the 3.3V2 voltage source, the 12th pin of the sensor chip IC7 is connected to one end of the resistor R25 and the 41st pin of the At128 microcontroller IC8, and the other end of the resistor R25 is connected to the 3.3V2 voltage source.

[0006] Its further characteristics are: the RF wireless transmission module includes a radio frequency chip IC10, the radio frequency chip IC10 adopts an LR30 radio frequency chip, the temperature sampling module includes a temperature sensor IC3, and the temperature sensor IC3 adopts an LM75 temperature sensor;

[0007] It also includes a power supply module, which is respectively connected to the MCU main control module, the RF wireless transmission module, the temperature sampling module, and the sensor module to provide internal power supply.

[0008] After adopting the above structure, since the sensor module uses the ADXL35X three-axis acceleration sensor, which has the advantages of small temperature drift and good seismic resistance, the test accuracy and reliability are higher. At the same time, combined with software design, the sensor can automatically cut off the power supply when the acceleration value exceeds a certain threshold, which is conducive to saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is the circuit schematic diagram of the MCU main control module of the utility model;

[0010] Figure 2 This is a circuit schematic diagram of the RF wireless transmission module of the utility model;

[0011] Figure 3 This is the circuit schematic diagram of the temperature sampling module of the utility model;

[0012] Figure 4 This is a circuit schematic diagram of the sensor module of the utility model;

[0013] Figure 5 This is a circuit schematic diagram of the power supply module of the utility model;

[0014] Figure 6 This is the circuit schematic diagram of the test point of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 5 As shown, an enhanced three-axis tilt sensor fulcrum control circuit includes an MCU main control module, an RF wireless transmission module, and a temperature sampling module. The MCU main control module is connected to the RF wireless transmission module and the temperature sampling module respectively, wherein the main control module includes an At128 single-chip microcomputer IC8, and the At128 single-chip microcomputer IC8 is respectively connected to a clock IC9, a crystal oscillator X2, and a storage chip IC6.

[0016] It also includes a sensor module connected to the main control module, the sensor module includes a sensor chip IC7, the sensor chip IC7 uses an ADXL35X three-axis acceleration sensor, the 1st and 3rd pins of the sensor chip IC7 are respectively connected to the 42nd and 43rd pins of the At128 microcontroller IC8, the 2nd and 4th pins of the sensor IC7 are connected and then grounded, the 5th pin of the sensor chip IC7 is connected to one end of the capacitor C25, one end of the capacitor C29 and a 3.3V2 voltage source, the 6th pin of the sensor chip IC7 is connected to the other end of the capacitor C25, the other end of the capacitor C29, one end of the capacitor C26, one end of the capacitor C28 and grounded, the other end of the capacitor C26 is connected to the The end of the sensor chip IC7 is connected to the other end of the capacitor C28 and then connected to the 8th pin of the sensor chip IC7. The 9th pin of the sensor chip IC7 is connected to one end of the capacitor C23, one end of the capacitor C24, one end of the capacitor C49, one end of the capacitor C50 and grounded. The other end of the capacitor C23 is connected to the other end of the capacitor C24 and then connected to the 10th pin of the sensor chip IC7. The other end of the capacitor C49 is connected to the other end of the capacitor C50 and then connected to the 11th pin of the sensor chip IC7 and the 3.3V2 voltage source. The 12th pin of the sensor chip IC7 is connected to one end of the resistor R25 and the 41st pin of the At128 single-chip microcomputer IC8. The other end of the resistor R25 is connected to the 3.3V2 voltage source. By adopting this enhanced three-axis acceleration sensor, it has the advantages of small temperature drift and good shock resistance, thereby ensuring higher accuracy and reliability of the test. At the same time, when the acceleration value of the sensor exceeds a certain threshold value (such as the threshold value can be 5g), it can automatically cut off the power supply and stop working, which is conducive to saving energy consumption.

[0017] The RF wireless transmission module includes a radio frequency chip IC10, which uses an LR30 radio frequency chip. Through the setting of the RF wireless transmission module, it can support data transmission in the 900MHz wireless transmission frequency band, and the transmission distance is longer. The temperature sampling module includes a temperature sensor IC3, which uses an LM75 temperature sensor. The temperature sampling module can be used to monitor the external environment temperature.

[0018] like Figure 6 As shown, it also includes a power supply module, which is respectively connected to the MCU main control module, the RF wireless transmission module, the temperature sampling module, and the sensor module and provides internal power supply. Through the setting of the power supply module, the internal power supply can be guaranteed, thereby improving the portability of use.

[0019] The above are only preferred specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by anyone familiar with the technology within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An enhanced three-axis tilt sensor fulcrum control circuit, comprising an MCU main control module, an RF wireless transmission module, and a temperature sampling module, wherein the MCU main control module is connected to the RF wireless transmission module and the temperature sampling module, respectively, and is characterized in that: It also includes a sensor module connected to the main control module, the main control module includes an At128 single-chip microcomputer IC8, and the At128 single-chip microcomputer IC8 is respectively connected to a clock IC9, a crystal oscillator X2 and a storage chip IC6; The sensor module includes a sensor chip IC7, and the sensor chip IC7 adopts an ADXL35X three-axis acceleration sensor. Pins 1 and 3 of the sensor chip IC7 are respectively connected to pins 42 and 43 of the At128 single-chip computer IC8, and pins 2 and 4 of the sensor IC7 are connected and then grounded. Pin 5 of the sensor chip IC7 is connected to one end of capacitor C25, one end of capacitor C29 and a 3.3V2 voltage source, and pin 6 of the sensor chip IC7 is connected to the other end of the capacitor C25, the other end of the capacitor C29, one end of the capacitor C26, one end of the capacitor C28 and grounded, and the other end of the capacitor C26 is connected to the other end of the capacitor C28 After being connected, the 8th pin of the sensor chip IC7 is connected, the 9th pin of the sensor chip IC7 is connected to one end of the capacitor C23, one end of the capacitor C24, one end of the capacitor C49, one end of the capacitor C50 and grounded, the other end of the capacitor C23 is connected to the other end of the capacitor C24 and then connected to the 10th pin of the sensor chip IC7, the other end of the capacitor C49 is connected to the other end of the capacitor C50 and then connected to the 11th pin of the sensor chip IC7 and the 3.3V2 voltage source, the 12th pin of the sensor chip IC7 is connected to one end of the resistor R25 and the 41st pin of the At128 microcontroller IC8, and the other end of the resistor R25 is connected to the 3.3V2 voltage source.

2. The enhanced three-axis tilt sensor fulcrum control circuit according to claim 1, characterized in that: The RF wireless transmission module includes a radio frequency chip IC10, and the radio frequency chip IC10 adopts an LR30 radio frequency chip. The temperature sampling module includes a temperature sensor IC3, and the temperature sensor IC3 adopts an LM75 temperature sensor.

3. The enhanced three-axis tilt sensor fulcrum control circuit according to claim 1, characterized in that: It also includes a power supply module, which is respectively connected to the MCU main control module, the RF wireless transmission module, the temperature sampling module, and the sensor module to provide internal power supply.

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